Experimental Analysis of Power Quality Issues in a Mobile House supplied by Renewable Energy Sources

This paper presents the results of an experimental analysis performed on a renewable hybrid system in order to evaluate the power quality of its electrical power network, which can be influenced by three factors: the variations in the power supplied by renewable energies due to the meteorological conditions, the adopted inverter and its control strategy, which is very meaningful for the performance of the whole system, the presence of non linear loads, which in recent years have dramatically increased. The results of the experimental analysis of the power quality parameters are presented in detail and investigated also with regard to European technical standards. The main parameters which have been investigated are: voltage and current total harmonic distortion, respectively THDV and THDI, voltage variations at fundamental frequency, the effect of insertion/disconnection (tripping) of inverters and flicker. They have been explained and compared with the requirements reported in the European power quality standards.